Bus route optimization method considering existing bus network structure

The invention belongs to the technical field of public transportation, and particularly relates to a bus route optimization method considering an existing bus network structure. According to the method, on the basis of an existing bus route, in combination with a real road network and OD data, the road and the bus route are subjected to nodal representation, meanwhile, the OD data and a node space are unified, and then the road network data, the bus route data and the OD data which are subjected to nodal representation are fused and optimized by adopting an ant colony algorithm. According to the method, on the basis of an existing bus network, the bus route trend planning can be automatically completed only by giving a bus route starting point, the bus complex line coefficient is considered during road section selection, the reasonability of the route and the route trend is ensured, meanwhile, the direct passenger flow volume can be maximized, the generation of high-repetition routes can be effectively reduce